Man Utd's identity is broken. They don't believe in youth anymore.
The Academy system has been dead for quite some time for the wealthy PL teams. It's just not a realistic way to acquire talent because there are way too many kids who would rather play 1st team football in Belgium/Holland rather than come up through the academies and play U18/U21 games.
Both the Jupiler league and Eredivise teams are comprised mostly of u21 players with some older players mixed in ...
One of problems in English football is that the English kids aren't going abroad and playing in the Belgian, Dutch, French, German, Spanish, Portuguese, and Russian Leagues, but rather are opting to stay at the academies.
Meanwhile the non-English kids pick up first division football, Europa League and Champions League while the English kids are stuck playing Wolves U21 and Stoke U21.